 Auto coil with voltage doubler and the "plasma bonds"
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Mates
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Registered Member #1025
Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
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Hi guys,
I tried a very simple idea and it surprisingly works very well. I built a voltage doubler from my home made caps  and two 50pc strings of 1N4007. The strings of diodes are inside a PVC tube (aquarists must know it). I used my mouth to suck silicon oil through the tube after I placed the diodes inside and filled it like that. I was afraid that just simple connection of these super cheap diodes in series (without caps and resistors) will destroy them. Apparently they can easily handle this…
The coil runs at 6 KHz. It runs straight from 220V AC (no transformer). I find out that the UCC37322 can easily drive also classical NPN transistors so I’m using HV transistor from old monitor (finally I have a use for them!). Otherwise the scheme is very similar like here
This was just a try but it makes me quite optimistic about building CW stack based on this system. Maybe I could reach my dream - 300KV DC…
Video is here:
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Mates
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Registered Member #1025
Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
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Let’s make this thread more interesting…
First of all; I increased the voltage of the coil twice (it must be close to 50KV AC now) so I can easilly reach over 8cm long sparks from the doubler and the diodes are still OK. BTW: The noise is horrible (ear-plugs are absolutely necessary).
Next I've made small experiment and I'd like to know your opinion...
I used a kid’s toy called whirligig made of solid piece of copper. It can keep rotation sometimes for 2 minutes. I placed running whirligig between two electrodes, while the base surface was under slight ankle. Normally the whirligig slides down according the gravity vector. I wanted to know whether the flow of electrons can stabilize the movement of the whirling (something like plasma bonds). And it works! Unfortunately I cannot show the whole experiment on a movie because my compact camera gets completely overexposed by the brightness of the sparks. Pictures below were taken using the highest aperture on my reflex camera!
Honestly, I cannot imagine any practical use for bonding conductive materials using this approach but it was good fun anyway…
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CompWiz
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Registered Member #1038
Joined: Mon Oct 01 2007, 08:02PM
Location:
Posts: 96
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This makes my Marx look weak...
but that is because I forgot that putting caps in series reduces the capacitance!
Looks nice!
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